Gjelsvik T, Ilyes R. Distribution of Late Silurian (?) and Early Devonian grey-green sandstones in the Liefdefjorden-Bockfjorden area, Spitsbergen. POLAR [Internet]. 1991Jan.3 [cited 2024Jul.16];9(1):77-8. Available from: https://polarresearch.net/index.php/polar/article/view/2351